Replace an O(n^2) algorithm in areCompatObjCQualInterfaces with an O(n) algorithm by taking advantage of the fact that the protocol qualifier list is already guaranteed sorted.
Replace an O(n^2) algorithm in areCompatObjCQualInterfaces with
an O(n) algorithm by taking advantage of the fact that the
protocol qualifier list is already guaranteed sorted.



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@49312 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang